the first technology of its kind... mom and dad, i have great news. is now providing answers families need. siemens. answers. [ ship horn blows ] no, no, no! stop! humans. one day we're coming up with the theory of relativity, the next... not so much. but that's okay -- you're covered with great ideas like optional better car replacement from liberty mutual insurance. total your car and we give you the money to buy one a model year newer. learn about it at libertymutual.com. liberty mutual insurance. responsibility. what's your policy? >>. >> shep: the president is headed to boston. white house says he will speak at an interfaith service dedicated to the victims of the boston bombing. earlier today mr. obama said the american people refuse to be terrorized and praised the actions. >> exhausted runners that kept running to the nearest hospital to give blood and those that stayed to attend to the wounded. first responders who ran into the chaos to save lives, if you want to know who we are, what america is, how we respond to evil, that is it. selfishly,